DD Audio SL612 D4

12″ subwoofer · dual 4 Ω · 600 W RMS

Fs 27 HzQts 0.41Vas 2.41 ft³Xmax 0.75″

Recommended box

For a sedan, one sub, 600 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.

Sealed

Net volume0.85 ft³ (24 L)
Qtc0.80
Fc53 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 10 15/16″
Open sealed box in designer

Ported

Net volume2.79 ft³ (79 L)
Tuning (Fb)28 Hz
Portslot 2 3/16 × 14 5/16″, 33 5/16″ long
Port velocity at 600 W65 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27 Hz
Qts0.41
Qes0.432
Qms7.91
Vas2.41 ft³
Re (one coil)≈ 3.4 Ω
Sd≈ 76 in²
Xmax0.75″
EBP63 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.9 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power600 W

Mounting dimensions

Ø12 9/16″cutout Ø11 5/16″mounting depth 4 1/8″magnet Ø6 1/2″
Cutout diameter11 5/16″
Mounting depth4 1/8″
Overall diameter12 9/16″
Magnet diameter6 1/2″

“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.

Data sources

Other DD Audio 12″ models